Investigation of the Influence of Injection Parameters on Particles Motion in Electric and Magnetic Fields for Designing
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SMA DIAGNOSTICS
Investigation of the Influence of Injection Parameters on Particles Motion in Electric and Magnetic Fields for Designing Plasma Separation Technique1 V. P. Smirnova, A. V. Gavrikova, V. S. Sidorova, V. P. Tarakanova, R. A. Timirkhanova, *, S. D. Kuzmicheva, b, R. A. Usmanova, b, and N. A. Voronaa aJoint
Institute for High Temperatures, Russian Academy of Sciences, Moscow, 125412 Russia Moscow Institute of Physics and Technology, Dolgoprudnyi, Moscow oblast, 141700 Russia *e-mail: [email protected]
b
Received October 17, 2018
Abstract—The paper continues studies of the capabilities of plasma treatment of spent nuclear fuel and radioactive waste. The study is devoted to the problem of integration of the plasma source and separator, while the initial conditions of the substance input are considered by taking into account the possibilities of the process implementation. The results of calculations are presented in the one-particle approximation of 3D trajectories of the substance ions simulating the components of spent nuclear fuel. The calculations have been performed for the magnetic field generated by the coils and for the model configurations of the electric field approximated for the experimental capabilities. The electric potential configurations and the initial conditions pertinent to plasma injection along the magnetic field have been proposed, which allow efficiently separating singly charged ions of model substances characterized by masses of 150 and 240 amu, energies in the range of 0.02–20 eV, and an initial angular spread in velocities of 60°. The distance between the separated beams with different masses is found to be 10 cm for the characteristic separator size of 1 m. DOI: 10.1134/S1063780X18120097
1. INTRODUCTION One of the relevant problems existing in the nuclear industry is the treatment of spent nuclear fuel (SNF) and radioactive waste (RAW) [1, 2]. In order to solve this problem, the works pertinent to the creation of a scientific foundation for innovative technical processes based on both chemical [2–4] and plasma approaches [5–10] are currently carried out. Particularly, one of the tasks of these technical processes is SNF fractionation based on the groups of substances and separation (for the subsequent use in refabricated fuel) of actinides from the products of their fission. A promising concept of SNF and/or RAW plasma treatment, which potentially, with reasonable power consumption, may provide necessary industrial productivity, meet the criteria of nonproliferation of nuclear weapons, and reduce the RAW quantity, has been proposed in [5, 11]. A distinctive feature of this concept is the use of the accelerating potential for overcoming the energy and angular spreads of plasma ions at the entrance to the separation zone and formation of a potential well for the spatial separation of ions with different masses. This approach supposes realization of several key tasks, such as generation of the 1 The article was translated by the authors.
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